Fixing breakage for kernel version 6.10 or above

[M-Allahham]

Here's a brief commit message on the kernel change this PR is accounting for:

"Recently the get_unmapped_area() pointer on mm_struct was removed in
favor of direct callable function that can determines which of two
handlers to call based on an mm flag. This function,
mm_get_unmapped_area(), checks the flag of the mm passed as an argument."

https://patchwork.kernel.org/project/linux-mm/patch/20240506160747.1321726-1-rick.p.edgecombe@intel.com/